I will keep everyone posted when I make some progress elmer ... From: Richard R. Linder To: VanDeGraaffGenerator@yahoogroups.com Sent: Monday, October 31, 2005...
Hi all may i ask you something? I built my VDGG... motor is a drilling machine 2700 rpm, rollers (10*4cm) are nylon on bottom and nylon covered with teflon...
Phoboss88, what color is the theraband, it may be that if you choose a bright color it may be conductive and so the generator doesn't work, I hear that grey is...
... a bright color it may be conductive and so the generator doesn't work, I hear that grey is good but I do not know about the other colors because they are...
May I suggest that you "divide the problem". First see if you are generating any tribo current by measuring the short circuit current with the HV terminal...
Hi phoboss It sounds like you have all the right materials, when I have built VDGs in the past, they never seem to work straight away, I have left them running...
I upload some photos of my VDGG...pls see them and tell me what i have wrong?...I make a leyden jar (http://home.earthlink.net/~lenyr/stat- gen.htm) and i try...
Hi Phoboss Yes a PVC and Nylon roller is a tried and tested combination, it should work well. I have looked at the photos of your VDG and I can see a couple of...
This is my first attempt in building a generator. I am helping my daughter build a Van De Graaff Generator for her science project. My thought is to use a...
This is my first attempt in building a generator. I am helping my daughter build a Van De Graaff Generator for her science project. My thought is to use a...
Ikea has some stainless steel mixing bowls on sale right now (I think they may be discontinued soon). They have no lip on them (they fit together nicely using...
Might be a bit pricey but Bodum (www.bodumusa.com) has a hemispherical bowl with what looks to be the perfect re-entrant curve. It would appear all you need to...
I just took a look at those bowls, and I'm not sure what you mean by re-entrant curve on these. It looks like two bowls joined together at the lip, leaving a...
My thinking was as follows: take the 10" Bodum bowl and cut out the inner bowl such that the curved rim has maybe a 1" re-entrance. Smooth the edges then mount...
Just my 2 cents: I think the re-entrant is misplaced. The critical spot for a re-entrant design is where the column enters the HV terminal. As far as the...
I am using very similar bowls for my machine and it works great, but even with access to a lathe I had real problems cutting a hole in the bottom one as an...
Hi all, New member here (re-visitting my boyhood HT obsession due to mid life crisis!). My local Homebase (Basingstoke) are doing spherical 9 inch diameter...
Is a there a reason why you don't want to use some metallic pipe or cylinder of appropriate size for your terminals instead of boxes? It should take tha...
Hello, Im new to the group and have a few questions. I have built two small vdgs out or pop cans, dish washing gloves(cuffs cut for belt), and various bits...
No there is no reason why I can't use a metallic pipe, but the problem is where do I get a pipe that is big enough to get at least 300 kV and I would like to...
Here in the US, I probably wouldn't even have to buy a cylinder that size, I would just find something at the local transfer station(aka dump). Americans...
Thanks Ben and Craig for your advice on the matter, it is really helping, because I don't know very much about the voltage generated by a VDG. It also saves me...
Hi, Having made a nice Jacob's ladder, I would like to graduate to a vdg generator. I am thinking about the apparently perennial problem of a nice round...
I'm writing a play about the science of Ben Franklin for the Museum of Science in Boston. I'd like to get a small VDG and/or other electrostatic generator demo...
hi i have decided 2 use polypropelyene for the lower roller and nylon66 for the upper if some one have used this type of configuration plz tell me didi it work...
can i mount the roller on the same shaft as that of roller as i have a long shaft to mount the roller.i mean wont it create problems on the working opt motor...
Should work fine. I'm still tweeking mine I made using polypropylene for the lower roller and some sort of soft rubbery rollers from a printer for the top...
I hope someone will be kind enough to help me out. Short story - science project for son - Wimshurst machine - Dad knows little about electronics. Don't need...
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